If the slope of an object's position versus time graph is decreasing, what does this indicate about the velocity of the object?

The percent efficiency of a machine can never be 100% (or greater), because in the real world some energy is always converted into a. heat b. work c. input force d. output force

Asmall, positively charged ball is moved close to a large, positively charged ball. which describes how the small ball likely responds when it is released? it will move toward the large ball because like charges repel. it will move toward the large ball because like charges attract. it will move away from the large ball because like charges repel. it will move away from the large ball because like charges attract.

To do work, this truck uses energy stored in chemical fuel and an electrical battery. how much total energy does this truck put out?